Sound motion picture



Feb. 6,1934. 7 A. N. GOLDSMITH 1,946,206

SOUND MOTION PICTURE Filed June 27, 1930 INVENTOR v ALFRED N. 60L MITH IBY i9 ATTORNEY Patented Feb. 1934 SOUND MOTION PIC' IUBE Tamed N.Goldsmith, New York, N. Y., minor to Radio Corporation of America, acorporation of Delaware Application June 2'2, 1930. Serial No.464,216

' 11 Claims. (01. sa -1cm This invention relates to an improved systemand method for the projection of combined talking motion pictures.

It relates more particularly to a system in 5 which it is unnecessary tohave electrical connections between the sound amplifying and reproducingsystem located behind the screen and the projector which is locatedsomewhat distant therefrom and in front thereof.

In the ordinary talking motion picture arrangement, in order to causethe sound produced to apparently emanate from the direction of theimages viewed on the motion picture screen, it is necessary that thesound reproducer be located back of the screen, or at least in thegeneral direction of the screen rather than in the vicinity of theprojector. This naturally requires a wiring arrangement between thesound reproducing apparatus on the talking motion picture ma.- chine andthe loud speaking apparatus arranged near the screen. In portableinstallations this is a considerable drawback as it necessitatesarranging ior connections being made between the screen and theprojector sometimes involving a considerable distance.

The object of this invention is to overcome this objection withparticular reference to a portable installation.

A further object of this invention is to produce 39 a system of talkingmotion pictures which shall be simplified and shall not require themaking of connections prior to having an exhibition.

A further object of this invention is to provide a talking motionpicture equipment in two selfcontained units requiring no electricalconnections therebetween.

These and further objects of my application will become apparent fromthe following specification taken in connection with the appendedclaims.

My proposed system involves projecting the image of the sound portion ofthe talking motion picture film to the vicinity of the motion picturescreen, and there causing it to act upon a photo- 45 electric cellarranged to actuate the sound reproducing device. necessary that theimage of the sound strip be projected from a point at which it iscontinuously moved in the same manner in which it is done when the soundreproduction takes place entirely in the sound motion picture machine. Aportion of the light used to project the picture portion of the film maybe utilized by means of a prism or lens to supply the light to projectthe image of the sound portion of the film, thereby illustrated) to thepick-up reel 10.

In accomplishing this, it is obviating the necessity for an additionalhigh powered lamp. I

The portion of the viewing screen upon which the image of the movingsound track image is projected is blackened or rendered otherwisenondeflecting, and a narrow slit is cut through the screen at rightangles to the direction of motion of the sound track. The photo cellisarranged behind the slit and connected to the amplifying device in theusual manner.

Having thus briefly described my invention, attention is invited to theaccompanying drawing in which; F represents the combined talking motionpicture film which is supplied by the reel 9 and passed through themachine (schematically The film is moved intermittently through thepicture projector portion of the film by means of the inter mittentsprocket 11. The light for projecting the film is supplied by means ofthe light source 12 and condensed upon the film by means of thecondenser lenses 13. The projector lenses la serve to focus theilluminated portion of the film upon the viewing screen 15 in the usualmanner. The film F is moved continuously through the means of thecontinuously moving sprocket 16. Thus the film F is moved. continuouslyat the point 17. A mirror 18 is arranged to deflect the portion of thelight from the light source 12 through the condenser lenses l9 and theaperture plate 20 upon the film at the point 17. The image of theportion of the film thus illuminated is focussed by means of theprojection lenses 21 upon the margin of the viewing screen 15. A soundslit 22 is arranged to admit a portion of the light thus focussed uponit to the rear of the screen where it falls upon the photo cell 23. Thephoto cell 23 is connected to the amplifier 24, which serves to amplifythe impulses created by the fluctuating light passing through the slitsound reproducing portion of the projector by ,22 and supply theamplified energy to the reproducing loud speaker device 25"in the usualmanner.

The light source may be of any well known type as, for instance, anincandescent lamp, and the projection and condenser lenses may be of theusual and well known type, per se, constituting no part of the presentinvention. The mirror 18 may be replaced by a prism or any otherarrangement for deflecting a portion of the light of the-- projectorlamp 12. The optical arrangement for the sound reproduction may be ofthe usual and wellknowntypeandanymeansmaybeusedior focussing the lightupon only a small linear-porno stituting in themselves a feature of thepresent invention. However, it is to be understood that the slit 22 maybe so arranged as to pass only a small portion of the actual image ofthe sound track therethrough to serve as an additional limitingarrangement with respect to the actual linear length of the soundstrip,causing the sound reproduction at any given instant. Thus the slit 22will assist the aperture member 20 in obtaining clear reproduction.

Having thus described my invention, attention is invited to the factthat I am not to be limited by the specific embodiment shown anddescribed for the purpose of illustration only, but by the scope of myinvention as set forth in the accompanying claims.

I claim:

1. In a talking motion picture arrangement, a viewing screen, a talkingmotion picture projec tor at a distance from said viewing screen. saidprojector including means for projecting a continuously moving image ofthe sound portion of the talking motion picture film upon said screen,said screen including a slit adapted to pass therethrough thecontinuously moving image of the sound portion of the film, and soundreproducing means adapted to be actuated by the image passed throughsaid slit and thus reproduce the sound recorded on the sound portion ofsaid sound motion picture film.

2. In a talking motion picture arrangement, a viewing screen, a talkingmotion picture projector at a distance from said viewing screen, saidprojector including means for projecting a continuously moving image ofthe sound portion of the talking motion picture film upon said screen,said screen including a slit adapted to pass therethrough thecontinuously moving image of the sound portion of the film, a lightsensitive device adapted to be actuated by the light passed I throughsaid slit. and sound reproducing means adapted to be actuated by saidlight sensitive device and thus reproduce the sound recorded on nthhlsound portion of said sound motion picture 3. In a talking motionpicture arrangement, a viewing screen, a slit disposed in the vicinityof said screen, a talking motion picture projector at a distance fromsaid viewing screen, said projector including means for projecting acontinuously movingimageofthesoundportionofthetalking motion picturefilm upon said slit, said slit being adapted to pass therethrough thecontinuously movingimage of the sound portion of the filmya 118m;sensitive device adapted to be actuated bythelightpassedthroughsaidslit,andsound reproducingmeansadaptedtobeactuatedbysaid' light sensitive device and thus reproduce the soundrecorded upon the sound portion of said\ sound motion picturefilm.

4. In a talking motion picture arrangement. a viewing screen, a talkingmotion picture projectoratadistancefromsaidviewingscreen, said projectorincluding means for projecting a continuously moving image of the soundportion of thetalkingmotionpicturefilmuponsaidscreen, said screenincluding a slit adapted to pass therethrougha portion ofthecontinuously moving im ageofthcsolmdpo'rtionotthefilmalightsensitivedevice adapted to be actuated by the lightpamedthroughsaidslitandsmmdreproducingmeansadaptedtobeactuatedbysaidlightsentlon of the sound track, none ofthese details concorded on the sound portion of said sound motionpicture film.

5. In a talking motion picture arrangement a viewing screen, a slitarranged in the vicinity of said motion picture screen, a talking motionpicture projector at a distance from said viewing screen, said projectorincluding means for projecting a continuously moving image of the soundportion of the talking motion picture film upon said slit, said slitbeing adapted to pass therethrough a portion of the continuously movingimage of the sound portion of the film, a light sensitive devicearranged to be actuated by the light passing through said slit, andsound reproducing means adapted to be actuated by said light sensitivedevice and thus reproduce the sound recorded on the sound portion ofsaid motion picturefilm.

6. In a' talking motion picture arrangement, a viewing screen, a talkingmotion pictureprojector at a distance from said viewing screen, saidprojector including means for projecting the image of the pictureportion of the film upon said viewing screen and means for projecting acontinuously moving image of the sound portion of the talking motionpicture film upon said screen, said screen including a slit adapted topass therethrough a porti of the continuously moving image of the sounportion of the film. a light sensitive device adapted to be actuatedbythe light passed through said slit, amplifying means for amplifyingthe current controlled by said light sensitive device and soundreproducing means adapted to be actuated by said amplifier device andthus reproduce the sound recorded "0 said viewing screen, a talkingmotion picture projector at a distance from said viewing screen, saidprojector including means for projecting the image of the pictureportion of said film upon said viewing screen, and means for projectinga continuously moving image of said sound portion of said talking motionpicture film upon said slit, said slit being adapted to passtherethrough a portion of the continuously moving image of the soundportion of the film, a

light sensitive device adapted to be actuated by the light passingthrough said'slit, amplifying means for amplifying the currentcontrolled by said light sensitive device, and sound reproducing meansadapted to be actuated by said amplifier device and thus reproducing thesound recorded 1 on the sound portion of said sound motion picture film.

8. In a talking motion picture arrangement, a viewing screen, a talkingmotion picture projecprojector including means for projecting the imageof the picture portion of the film upon said viewing screen and meansfor projecting a continuously moving image of the sound portion of thetalking motion picture film upon said screen, and a common light sourcefor both of said projecting means, said screen including a slit adaptedto pass therethrough a portion of the continuously moving image of thesound portion of the film, a light sensitive device adapted to beactuated by' the light passed through said slit, amplifying means foramplifying the current controlled by said light sensitive device andsound reproducing means adapted to be actuated by tor at a distance fromsaid viewing screen, said III sitlve device andthmreprodncethesoundresaidamplifier device and thus reproduce the" soundrecorded on the sound portion of said sound motion picture film. v

9. In a talking motion picture arrangement. a viewing screen, a slitdisposed in the vicinity of said screen, a talking motion pictureprojector at a distance from said viewing screen, said'projectorincluding means for projecting the image of the picture portion of thefilm upon said viewing screen, means for projecting the continuouslymoving image of the sound portion of the talking motion picture filmupon-said screen, and a common light source for both ofsaidproiectingmeans, said slit being adapted to pass therethrough aportion of the moving image of the sound portion of the film, a lightsensitive device adapted to be actuated by the light passing throughsaid slit, amplifying meansvior amplifying the current controlled bysaid light sensitive device, and a sound reproducing device adapted tobe actuated by said amplifier-device, and thus reproducing the soundrecorded on said soundportion or said sound motion picture film.

10. Talking motion picture apparatus comprising a viewing screen, amarginal screen adjacent said viewing screen and having a slit therein,photoelectric means adjacent said slit and sound reproducing meansconnected to said photoelectric means for operation thereby; andprojecting means remote from said screen for projecting moving picturesupon said viewing screen and sound records upon said marginal screen andslit.

11. Talking motion picture apparatus comprising a single viewing screen,a marginal screen adjacent said viewing screen and having a slittherein, photoelectric means adjacent said slit and sound reproducingmeans connected to said photoelectric means for operation-thereby; andprojecting means remote from said screen for projecting moving picturesuponsaid viewing screen and sound records upon said projection screenand slit.

AIJ'RED N. GOLDSMI'IH.

